GPS+北斗双模模式输出信息实例：
未定位输出
$GNRMC,,V,,,,,,,,,,N,V*37
$GNVTG,,,,,,,,,N*2E
$GNGGA,,,,,,0,00,99.99,,,,,,*56
$GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99,1*33
$GNGSA,A,1,,,,,,,,,,,,,99.99,99.99,99.99,4*36
$GPGSV,1,1,00,0*65
$GBGSV,1,1,00,0*77
$GNGLL,,,,,,V,N*7A
定位之后的输出
$GNRMC,020218.00,A,2240.85190,N,11402.70667,E,0.006,,150618,,,A,V*17
$GNVTG,,T,,M,0.006,N,0.011,K,A*3B
$GNGGA,020218.00,2240.85190,N,11402.70667,E,1,12,0.64,73.4,M,-2.5,M,,*67
$GNGSA,A,3,08,27,23,09,16,11,18,26,07,31,,,1.18,0.64,0.99,1*01
$GNGSA,A,3,06,13,03,07,01,10,02,08,09,,,,1.18,0.64,0.99,4*0D
$GPGSV,4,1,14,04,03,070,,07,14,319,44,08,74,240,49,09,37,289,49,0*6F
$GPGSV,4,2,14,11,25,193,44,16,32,040,44,18,22,170,44,21,01,042,,0*63
$GPGSV,4,3,14,23,50,240,47,26,15,064,35,27,63,028,50,31,09,124,44,0*61
$GPGSV,4,4,14,42,46,123,41,50,46,123,41,0*63
$GBGSV,4,1,15,01,52,126,43,02,46,234,38,03,64,189,43,04,33,110,41,0*7B
$GBGSV,4,2,15,06,26,190,39,07,56,019,43,08,46,159,42,09,39,217,40,0*7C
$GBGSV,4,3,15,10,48,330,42,13,30,182,42,16,51,320,41,17,,,28,0*48
$GBGSV,4,4,15,18,51,342,45,27,32,206,43,28,36,042,44,0*44
$GNGLL,2240.85190,N,11402.70667,E,020218.00,A,A*79
GPS数据输出和信号测试
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